Inhalation toxicity of thermal transformation products formed from e cigarette vehicle liquid using an in vitro lung model exposed at the Air Liquid Interface ScienceDirect Meilleur E liquide Menthe et Menthol Fracheur Intense et Hit Toxic Metals in E cigarettes Lead to Oxidative DNA Damage StressMarq Tous nos e liquides menthe TAFFE ELEC E liquid The Benefits of Vegetable Glycerin and Propylene Glycol Eliquidstop Propylene glycol may be safe to eat, but its toxic to inhale. Inhaling this toxic e cigarette liquid ingredient can lead to lung inflammation and higher risk of respiratory disease.